CN106218622B - A kind of vehicle active power-assisted braking arrangement and its control method - Google Patents
A kind of vehicle active power-assisted braking arrangement and its control method Download PDFInfo
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- CN106218622B CN106218622B CN201610850415.7A CN201610850415A CN106218622B CN 106218622 B CN106218622 B CN 106218622B CN 201610850415 A CN201610850415 A CN 201610850415A CN 106218622 B CN106218622 B CN 106218622B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Regulating Braking Force (AREA)
Abstract
Present invention discloses a kind of vehicle active power-assisted braking arrangements, including brake pedal push rod, master cylinder push rod, vacuum chamber and working chamber and three-way magnetic valve, the present invention cancels high-voltage energy storage device, two-bit triplet solenoid valve is replaced with into the 3-position-3-way solenoid valve with self-locking function, it can be realized under power-down state, long-time pressure is kept, while can guarantee the validity and reliability of foot-propelled braking and failure mode braking.
Description
Technical field
The present invention relates to vehicle braking field more particularly to active power-assisted braking arrangement and implementation methods.
Background technique
With the development of vehicle drive auxiliary and intelligent driving technology, conventional vehicular brake has been unable to satisfy braking requirement,
Active brake function must be increased.The scheme of mainstream is namely based on brake fluid system at present, in the base of original braking system ESP
Realize that series/parallel actively increases on active boost function or dual input pipeline between master cylinder and ABS/ESP on plinth
Pressure device is realized.
In addition to this, there are also a kind of modes for realizing active brake, exactly improve to vacuum booster, by automatically controlled
Mode realize active power brake, can drive simulating person trample brake pedal pass through vacuum booster realize braking mistake
Journey, former vehicle braking system still retain.
102060009 B of patent CN proposes a kind of braking system with electronic braking assisting function, and the program is true
Electromagnet, casing and electromagnetic coil are increased inside empty booster, by controlling the size of solenoid current, control electromagnet
And the direction of motion of casing, realize the control of vacuum chamber and working chamber valve.
A kind of electronic vacuum booster device of 102050100 A of patent CN also uses similar scheme.The program is in reality
In the use process of border, there is control, precision is low, opened loop control, and stability is difficult to ensure, and with the passage for using the time, control
Location error accumulation processed is easy to cause position excursion, and there are failure risks for system.
In view of problem above, 105539410 A of patent CN proposes a kind of brake system of car active boost device,
The program has carried out aperture on vacuum chamber and working chamber, has increased separately vacuum lumen on the basis of former vacuum booster
With work lumen, and by two-bit triplet solenoid valve control vacuum lumen, work lumen and atmosphere between on-off realize vacuum
Power-assisted process can be simulated completely and manually trample brake pedal, and the process of active brake is realized by means of vacuum booster, realize
Active brake.But the program uses high-voltage energy storage device, depressurizes in advance, builds the pressure time although shortening, there is oil
The risk of liquid leakage builds pressure when value of the accumulator oil liquid pressure lower than setting again, and for braking requirement repeatedly is continued, system is rung
Extend between seasonable, in addition use two-bit triplet solenoid valve, pass through, by the size of current control valve core for controlling electromagnetic valve coil
Position need persistently to be powered to coil, be unable to satisfy the demand braked for a long time, especially needle when needing pressure maintaining
To the vehicle of no EPB braking system, long-time parking braking cannot achieve.
Summary of the invention
The technical problem to be solved by the present invention is to realize that one kind can ensure long-time parking safety, reliable vehicle master
Dynamic power-assisted braking arrangement.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of vehicle active power-assisted braking arrangement, including
Brake pedal push rod, master cylinder push rod, vacuum chamber and working chamber, the vacuum chamber connect vacuum tube, and the vehicle actively helps
Power-absorption unit is equipped with three-way magnetic valve, and the solenoid valve casing both ends of the three-way magnetic valve, which are equipped with, is connected with inside port A
With port C, middle part, which is equipped with, is connected with inside port B, and the first fairlead of the port A and vacuum chamber connects, the port B
It is connect with the second fairlead of working chamber, the port C connection atmosphere, spool, the electromagnetism is equipped in the solenoid valve casing
The both ends of valve shell are respectively equipped with driving spool along the A end-coil and B end-coil of solenoid valve casing internal slide, when the spool
When positioned at solenoid valve casing medium position, vacuum chamber, working chamber and atmosphere are mutually isolated, when the spool is located at solenoid valve casing
Port location of C when, vacuum chamber is connected to working chamber.
The solenoid valve casing is equipped with self-locking mechanism shell by the position of the one end proximal port C, in the self-locking mechanism shell
Equipped with that can slide along the self-locking mechanism magnetic pin for protruding into or exiting solenoid valve casing, the spool is equipped with spool notch, works as institute
When stating spool and being located at the port location of C of solenoid valve casing, valve is embedded in if the self-locking mechanism magnetic pin protrudes into solenoid valve casing
In core notch, the spool is slided in self-locking mechanism shell by self-locking mechanism coil drive.
Self-locking mechanism reset spring is equipped between the self-locking mechanism coil and spool.
The solenoid valve casing is equipped with the end the A spring of support spool, the solenoid valve casing by the inside of the one end proximal port A
The end the B spring of support spool is equipped with by the inside of the one end proximal port B
The reset spring for being used to support cavity is equipped in the vacuum chamber.
The vehicle active power-assisted braking arrangement is equipped with control module, and the control module receives brake pedal displacement sensing
The on-position signal of device, the parked state information of electronic brake button, the top level control system parameter of CAN communication module
The master cylinder current pressure signal of signal and master cylinder pressure sensor, the control module output drive signal to A end-coil, B
End-coil and self-locking mechanism coil.
Control method based on the vehicle active power-assisted braking arrangement:
Step 1, system electrification, static self-test, if faulty, fault alarm is no to then follow the steps 2；
Step 2, in real time acquisition brake pedal displacement signal, if pedal displacement signal is judged as that manual intervention is braked,
Step 3 is executed into foot-propelled braking mode, it is no to then follow the steps 4；
Step 3, foot-propelled braking, three-way magnetic valve reset, and active brake is invalid, return step 2；
Step 4, the brake request that acquisition vehicle CAN module is sent in real time, if there is active brake demand and are provided with mesh
Loine pressure P is marked, 5 is thened follow the steps and enters active brake mode, it is no to then follow the steps 3；
Step 5 judges whether this vehicle speed is 0, if speed is 0, thens follow the steps 6, no to then follow the steps 8；
Step 6, into EPB electronic brake mode, control electronic brake system and implement braking, active power-assisted system
Dynamic device does not start, and executes step 7；
Step 7 judges whether to meet the condition of EPB electronic brake mode of exiting, no if it is thening follow the steps 2
Then follow the steps 6；
Step 8, into service brake active brake mode, self-locking mechanism unlock, valve core of the electromagnetic valve set to the left, working chamber
And atmosphere, increase the stage into power-assisted, and execute step 9；
Step 9, real-time detection master cylinder hydraulic pressure and Real-time Feedback pressure value P ', according to P and P' difference and setting
Thresholding T be compared, if P-P'> T, thens follow the steps 10, else if | P-P'| < T thens follow the steps 11, otherwise
Execute step 12；
Step 10 increases the control period into power-assisted, and A end-coil is powered, and valve core of the electromagnetic valve is set to left end, into PID
Then period control executes by adjusting the time of duty ratio the control working chamber 4 and atmosphere of the PWM of control A end-coil
Step 2；
Step 11 keeps stage, A end-coil power down, work of the valve core of the electromagnetic valve in the end A spring and the end B spring into power-assisted
With lower reset, vacuum chamber, working chamber and atmosphere are isolated from each other, and then execute step 2；
Step 12 reduces the control period into power-assisted, is powered to self-locking mechanism coil, self-locking mechanism unlock, then A end line
Power down is enclosed, B end-coil is powered, and valve core of the electromagnetic valve is set to right end, controls into the PID period, by adjusting control A end-coil
The time of duty ratio the control working chamber 4 and atmosphere of PWM, then execute step 2.
The present invention has the advantages that
The present apparatus eliminates high-voltage energy storage device, carries out brake piping real-time pressure feedback by pressure sensor, overcomes
The risk of oil liquid leakage can build the pressure time by braking shortening system in advance, can satisfy application demand in practical applications；
The present apparatus uses 3-position-3-way solenoid valve, overcomes two-bit triplet solenoid valve and passes through the control of control coil size of current
When spool position processed, there are problems that position excursion and lead to thrashing；
The 3-position-3-way solenoid valve that the present apparatus uses is built-in with self-locking mechanism, and power down power-assisted may be implemented by the mechanism and protect
It holds, i.e. long-time braking requirement under realization electronic brake and extreme operating condition.
Detailed description of the invention
Below to width attached drawing every in description of the invention expression content and figure in label be briefly described:
Fig. 1 is vehicle active power-assisted braking arrangement structural schematic diagram；
Fig. 2 is that Fig. 1 is middle three-way magnetic valve structural schematic diagram；
Fig. 3 is vehicle active power-assisted braking arrangement functional block diagram；
Fig. 4 is vehicle active power-assisted braking arrangement loine pressure control schematic diagram；
Fig. 5 is vehicle active power-assisted braking arrangement control flow chart；
Label in above-mentioned figure is equal are as follows:
1, brake pedal push rod；2, master cylinder push rod；3, vacuum chamber；4, working chamber；5, reset spring；6, vacuum tube；
7, the first fairlead；8, the second fairlead；9, three-way magnetic valve；10, control module；11, brake pedal displacement sensor；12,
Electronic brake button；13, CAN communication module；14, master cylinder pressure sensor；
91, self-locking mechanism coil；92, self-locking mechanism reset spring；93, self-locking mechanism shell；94, self-locking mechanism magnetic pin；
95, A end-coil 95；96, the end A spring；97, spool；98, spool notch；99, the end B spring；910, B end-coil；911, solenoid valve
Shell；912, port A；913, port B；914, port C.
Specific embodiment
Two-bit triplet solenoid valve 9 is replaced with the 3-position-3-way with self-locking function by vehicle active power-assisted braking arrangement of the present invention
Solenoid valve 9, can be realized under power-down state, and long-time pressure is kept, while can guarantee foot-propelled braking and failure mode braking
Validity and reliability.
That is pipeline and three energizations with self-locking function are drawn in the aperture on former vehicle vacuum booster vacuum chamber 3 and working chamber 4
Two input ports of magnet valve 9 connect, another port of solenoid valve leads directly to atmosphere.By control solenoid valve both ends coil with
And self-locking mechanism can be realized three-way magnetic valve 9 and power on set to the left, power down intermediate reset and realize power down by self-locking mechanism
In the case of set to the right.To realize that long-time power-assisted keeps realizing that long-time hydraulic coupling is kept, meet parking braking and pole
Hold the long-time braking requirement under operating condition.
The automatic switchover between foot-propelled braking and active power brake mode may be implemented in the program.Control unit only needs in real time
Electronic brake pedal inbuilt displacement sensor output signal is captured, judges whether driver has carried out foot-propelled brake regulation, thus
Automatic implementation pattern switching.
Specifically, device is as described in Figure 1, including brake pedal push rod 1, master cylinder push rod 2, vacuum chamber 3, working chamber
4, reset spring 5, vacuum tube 6,3 fairlead of vacuum chamber, 4 fairlead of working chamber and three-way magnetic valve 9.
Referring to Fig.2, three-way magnetic valve 9 is 3-position-3-way valve body, including self-locking mechanism coil 91, self-locking mechanism reset spring
92, self-locking mechanism shell 93, self-locking mechanism magnetic pin 94, A end-coil 95, the end A spring 96, spool 97, spool notch 98, the end B bullet
Spring 99, B end-coil 910, solenoid valve casing 911, port A 912, port B913, port C914.
As shown in figure 3, active power brake control system includes control module 10, brake pedal displacement sensor 11, electricity
Sub- parking brake button 12, CAN communication module 13 and master cylinder pressure sensor 14.
Brake pedal is built-in with displacement sensor, and Power assisted control unit judges to drive by the output signal of displacement sensor
Whether member has carried out foot-propelled brake regulation, to judge whether to need to carry out braking mode switching.
The input port A of three-way magnetic valve 9 with self-locking function is connect with 3 fairlead of vacuum chamber, input port B 913 with
The connection of 3 fairlead of vacuum chamber, input port C are connect with atmosphere.It is built in by control valve core of the electromagnetic valve 97 in valve housing different
Position can be realized to the connection control between vacuum chamber 3, working chamber 4 and atmosphere, realize active power brake.
Three-way magnetic valve 9 is built-in with self-locking mechanism, self-locking by that can pick up magnetic pin to the energization of self-locking mechanism coil 91
Mechanism unlock.Then it is powered to A end-coil 95, the set to the left under the magnetic force of spool 97, the pipe of working chamber 4 and air pipe connect
Logical, vacuum boost system is in power-assisted and increases the stage.PWM duty cycle by controlling A end-coil 95 can control valve unlatching
Time controls pressurization time.System carries out pressure closed loop control by the pressure feedback signal of master cylinder hydraulic pressure pressure sensor.
It after feedback pressure reaches the target value of setting, is kept if necessary to power-assisted, then gives 95 power down of A end-coil, spool
97 reset under the action of the end A spring 96 and the end B spring 99, in an intermediate position, at this time vacuum chamber 3, working chamber 4 and big gas phase
Mutually isolation.Power-assisted is in the holding stage.Solenoid valve power down at this time, therefore the holding of long-time power-assisted may be implemented, electronics may be implemented
Parking braking and for a long time braking are kept.
It when needing power-assisted to reduce, is then powered to self-locking mechanism coil 91, then B end-coil 910 is given in self-locking mechanism unlock
It is powered, the set to the right under the magnetic force of spool 97 can allow self-locking mechanism to be continuously in when power-assisted is in the adjusting stage
Unlocking phases carry out vacuum chamber 3 and 4 Lifetime of working chamber by adjusting the duty ratio of the PWM of control B end-coil 910 at this time
Control.
After end of braking, then 91 power down of self-locking mechanism coil is given in the set to the right of spool 97, magnetic pin is multiple in self-locking mechanism
It resets and is fallen into spool notch 98 under the action of the spring 92 of position, after giving 910 power down of B end-coil, spool 97 is due to self-locking mechanism
Limit, can not also reset under the action of spring 99 of the end B, therefore the company of vacuum chamber 3 and working chamber 4 under power-down conditions may be implemented
It is logical.
After displacement signal of the control module 10 by the pedal displacement sensor output of acquisition, if it is determined that driver steps on
Brake pedal is stepped on, then braking mode enters foot-propelled braking mode.It is powered on first to self-locking mechanism coil 91, in the effect of magnetic force
Lower to pick up magnetic pin, spool 97 automatically resets under the action of spring 99 of the end B.Vacuum chamber 3, working chamber 4 and atmosphere are isolated from each other.
The A end-coil 95 and B end-coil 910 of three-way magnetic valve 9 as shown in Figure 4 are controlled by PWM, by adjusting
The duty ratio of PWM can control the opening time of valve, to realize the accurate control that power-assisted increases and reduces.According to master cylinder liquid
The pressure feedback of pressure pressure sensor realizes period Closed-loop pressure control.It is controlled assuming that control unit receives upper layer by CAN bus
The master cylinder hydraulic pressure pressure target value of default processed is P, and the pressure feedback value of master cylinder hydraulic pressure pressure sensor is P', then according to difference
Value | P'-P | absolute value with setting threshold value T be compared, determine current power-assisted be increase, reduce or keep.It determines
Afterwards, the adjusting of next period PWM duty cycle is carried out according to difference.
Refering to Fig. 5, the control method based on above-mentioned vehicle active power-assisted braking arrangement is as follows:
Step 1, system electrification, static self-test, if faulty, fault alarm is no to then follow the steps 2；
Step 2, in real time acquisition brake pedal displacement signal, if judging that manual intervention is made according to pedal displacement signal
It is dynamic, then enter foot-propelled braking mode and executes step C, it is no to then follow the steps 4；
Step 3, foot-propelled braking, 3-position-3-way solenoid valve 9 reset, and active brake is invalid, then executes step 2；
Step 4, the brake request that acquisition vehicle CAN module is sent in real time, if there is active brake demand and are provided with mesh
Loine pressure P is marked, thens follow the steps 5, it is no to then follow the steps 3 into active brake mode；
Step 5 judges whether this vehicle speed is 0, if speed is 0, thens follow the steps 6, no to then follow the steps 8；
Step 6, into EPB electronic brake mode, control electronic brake system and implement braking, this active power-assisted
Braking system does not start, and then executes step 7；
Step 7 judges whether to meet the condition of EPB electronic brake mode of exiting, no if it is thening follow the steps 8
Then follow the steps 6；
Step 8, into service brake active brake mode, self-locking mechanism unlock, the set to the left of valve core of the electromagnetic valve 97, work
Chamber 4 and atmosphere increase the stage into power-assisted, then execute step 9；
Step 9, real-time detection master cylinder hydraulic pressure and Real-time Feedback pressure value P ', according to P and P' difference and setting
Thresholding T be compared, if P-P'> T, thens follow the steps 10, else if | P-P'| < T thens follow the steps 11, otherwise
Execute step 12；
Step 10 increases the control period into power-assisted, and A end-coil 95 is powered, and valve core of the electromagnetic valve 97 is set to left end, enters
The PID period controls, by adjusting the time of duty ratio the control working chamber 4 and atmosphere of the PWM of control A end-coil 95, so
Step 2 is executed afterwards；
Step 11 is kept for the stage into power-assisted, and 95 power down of A end-coil, valve core of the electromagnetic valve 97 is in the end reset spring 5A spring
It is resetted under the action of the end 96 and B spring 99, vacuum chamber 3, working chamber 4 and atmosphere are isolated from each other, and then execute step 2；
Step 12 reduces the control period into power-assisted, is powered to self-locking mechanism coil 91, self-locking mechanism unlock, then the end A
95 power down of coil, B end-coil 910 are powered, and valve core of the electromagnetic valve 97 is set to right end, controls into the PI D period, by adjusting control
The time of duty ratio the control working chamber 4 and atmosphere of the PWM of A end-coil 95 processed, then execute step 2.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (5)
1. a kind of control method of vehicle active power-assisted braking arrangement,
The vehicle active power-assisted braking arrangement includes brake pedal push rod, master cylinder push rod, vacuum chamber and working chamber, described
Vacuum chamber connects vacuum tube, it is characterised in that: the vehicle active power-assisted braking arrangement is equipped with three-way magnetic valve, and described three are powered
The solenoid valve casing both ends of magnet valve, which are equipped with, is connected with inside port A and port C, and middle part is equipped with and is connected with inside port B, institute
The first fairlead for stating port A and vacuum chamber connects, and the second fairlead of the port B and working chamber connects, and the port C connects
Atmosphere is connect, spool is equipped in the solenoid valve casing, the both ends of the solenoid valve casing are respectively equipped with driving spool along solenoid valve
The A end-coil and B end-coil of interior of shell sliding, when the spool is located at solenoid valve casing medium position, vacuum chamber, work
Chamber and atmosphere are mutually isolated, and when the spool is located at the port location of C of solenoid valve casing, vacuum chamber is connected to working chamber;
The solenoid valve casing is equipped with self-locking mechanism shell by the position of the one end proximal port C, is equipped in the self-locking mechanism shell
The self-locking mechanism magnetic pin for protruding into or exiting solenoid valve casing can be slid along, the spool is equipped with spool notch, when the valve
When core is located at the port location of C of solenoid valve casing, it is embedded in spool if the self-locking mechanism magnetic pin protrudes into solenoid valve casing and lacks
In mouthful, the spool is slided in self-locking mechanism shell by self-locking mechanism coil drive;
Control method based on the vehicle active power-assisted braking arrangement:
Step 1, system electrification, static self-test, if faulty, fault alarm is no to then follow the steps 2；
Step 2, in real time acquisition brake pedal displacement signal enter if pedal displacement signal is judged as that manual intervention is braked
Foot-propelled braking mode executes step 3, no to then follow the steps 4;
Step 3, foot-propelled braking, three-way magnetic valve reset, and active brake is invalid, return step 2；
Step 4, the brake request that acquisition vehicle CAN module is sent in real time, if there is active brake demand and are provided with target tube
Road pressure, it thens follow the steps 5 and enters active brake mode, it is no to then follow the steps 3；
Step 5 judges whether this vehicle speed is 0, if speed is 0, thens follow the steps 6, no to then follow the steps 8；
Step 6, into EPB electronic brake mode, control electronic brake system and implement braking, active power brake dress
It sets and does not start, and execute step 7;
Step 7 judges whether otherwise meet the condition for exiting EPB electronic brake mode holds if it is thening follow the steps 2
Row step 6；
Step 8, into service brake active brake mode, self-locking mechanism unlock, valve core of the electromagnetic valve set to the left, working chamber and big
Gas connection increases the stage into power-assisted, and executes step 9；
Step 9, real-time detection master cylinder hydraulic pressure and Real-time Feedback pressure value, according toWithThe door of difference and setting
LimitIt is compared, if, 10 are thened follow the steps, else if, 11 are thened follow the steps, otherwise
Execute step 12；
Step 10 increases the control period into power-assisted, and A end-coil is powered, and valve core of the electromagnetic valve is set to left end, into the PID period
Then control executes step by adjusting the time of duty ratio the control working chamber and atmosphere of the PWM of control A end-coil
2；
Step 11 is kept for the stage into power-assisted, and A end-coil power down, valve core of the electromagnetic valve is under the action of the end A spring and the end B spring
It resets, vacuum chamber, working chamber and atmosphere are isolated from each other, and then execute step 2；
Step 12 reduces the control period into power-assisted, is powered to self-locking mechanism coil, and self-locking mechanism unlock, then A end-coil falls
Electricity, B end-coil are powered, and valve core of the electromagnetic valve is set to right end, controls into the PID period, by adjusting the PWM of control A end-coil
Duty ratio control working chamber and atmosphere time, then execute step 2.
2. control method according to claim 1, it is characterised in that: be equipped with certainly between the self-locking mechanism coil and spool
Latch mechanism reset spring.
3. control method according to claim 2, it is characterised in that: the solenoid valve casing is interior by the one end proximal port A
Portion is equipped with the end the A spring of support spool, and the solenoid valve casing is equipped with the end the B bullet of support spool by the inside of the one end proximal port B
Spring.
4. control method according to claim 3, it is characterised in that: be equipped in the vacuum chamber and be used to support answering for cavity
Position spring.
5. according to control method described in claim 2,3 or 4, it is characterised in that: the vehicle active power-assisted braking arrangement is set
There is control module, the control module receives on-position signal, the electronic brake button of brake pedal displacement sensor
Parked state information, CAN communication module top level control system parameter signal and master cylinder pressure sensor master cylinder it is current
Pressure signal, the control module output drive signal to A end-coil, B end-coil and self-locking mechanism coil.
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| CN201610850415.7A CN106218622B (en) | 2016-09-26 | 2016-09-26 | A kind of vehicle active power-assisted braking arrangement and its control method |
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| CN201610850415.7A CN106218622B (en) | 2016-09-26 | 2016-09-26 | A kind of vehicle active power-assisted braking arrangement and its control method |
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| CN106218622A CN106218622A (en) | 2016-12-14 |
| CN106218622B true CN106218622B (en) | 2019-02-26 |
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| DE102018213284A1 (en) * | 2018-08-08 | 2020-02-13 | Continental Teves Ag & Co. Ohg | Brake system for a motor vehicle |
| US11643062B2 (en) * | 2019-11-19 | 2023-05-09 | ZF Active Safety US Inc. | Vehicle brake system and diagnostic method for determining a leak in one or more three-way valves |
| US11498544B2 (en) * | 2019-11-19 | 2022-11-15 | ZF Active Safety US Inc. | Vehicle brake system and diagnostic method for determining a leak in one or more three-way valves |
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| CN101054085B (en) * | 2006-04-16 | 2014-09-10 | 傅建中 | Braking anti-lock system with running braking function |
| EP2871105B1 (en) * | 2012-07-06 | 2018-06-13 | Hitachi Automotive Systems, Ltd. | Pneumatic booster device and brake device |
| JP2014111407A (en) * | 2012-12-05 | 2014-06-19 | Bosch Corp | Negative pressure assistor and brake system using negative pressure assistor |
| JP5758374B2 (en) * | 2012-12-27 | 2015-08-05 | 日信工業株式会社 | Negative pressure booster |
| CN204610956U (en) * | 2015-04-22 | 2015-09-02 | 延安大学 | A kind of three-way magnetic valve |
| CN105019966B (en) * | 2015-08-03 | 2017-11-07 | 浙江师范大学 | A kind of high-power engine brake apparatus and method |
| CN105539410B (en) * | 2015-12-30 | 2017-12-26 | 吉林东光奥威汽车制动系统有限公司 | A kind of brake system of car active boost device |
| CN206125026U (en) * | 2016-09-26 | 2017-04-26 | 安徽工程大学 | Vehicle initiative helping hand arresting gear |
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2016
- 2016-09-26 CN CN201610850415.7A patent/CN106218622B/en active Active
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